Cooking-machine.



No. 814,540. PATENTED MAR. 6, 1906.

H. A. HIGBBB.

COOKING MACHINE. Y APPLIoAnoN Hmm JUNms. 1904.

4 SHEETS-SHEET 1.

No. 814,540. PATENTED MAB.. 6, 1906. H. A. HIGBEE.

COOKING. MACHINE.

APPLICATION .FILED JUNE 23, 1904.

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No. 814,540. PATBNTED MAR.'0, 1900.

H. A.. HIGBBB.

GOOKING'MAUHINE. APPLIOATION FILED JIJ-N323. 1004.

l SHEETS-SHEET 3.

No. 814,540. PATEN-TED MAR. 6, 1906.

' H. A. HIGBEE.

COOKING MACHINE.

APPLICATION FILED JUNE 23, 1904.

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HARRIET A. HIGBEE,IOF WORCESTER,

, MASSACHUSETTS, ASSIGN OR TO HENRY D. PERKY, OF GLENCOE, MARYLAND.

COOKING-MACHINE.

Specification of Letters Patent.

Patented March 6, 1906.

Application iled June 23, 1904. Serial No. 213,823.

Be it knwn that I, HARRIET A. HIGBnE,a

Vss

. drawings, and

citizen of the United States, and aresident of Worcester, in the county of Worcester and State of Massachusetts, have made a certain new and useful Invention in Cooking-,Machines and I declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying to letters and figures of reference marked thereon, which form a part of this (specification.

Flgure 1 is a vertical central section of the cook1ng-machine. Fig. 2 is a sectional view on the line 2 2 of Fig. 1, parts broken away, showin the second and third tiers. Fig. 3 is a deta' view showing fuel-pipes. Fig. 4 is a detail sectional view of wall-joint. Fig. 5 .shows details of register. Fig. 6 is a detail view of that part of the machine which has a rotary movement.

The invention relates to machines; and it consists 1n the novel construction and combinations of parts, as hereinafter set forth.

In the accom anying drawings, illustrating the invention, t e letter a; designates the incasement, which is cylindrical and made of sheet metal, the walls being lined with asbestos. The topb is preferably made in the form of a flat cone suitably strengthened by radial ribs b and having a central escape at c for the products ofcombustion.- The top is provided with a peripheral joint-ange d, which is designed to be bolted to a similar j oint-liange at the top of the cylindrical wall. The oven portion is supported by suitable standards 15 and is normally ldivided into three tlers, one above another.

, The oor of the upperchamber d forms the top of the middle tier. It consists of the annular ledge or shelf e, which is secured to the cylindrical wall, and the interior circular table portion f, which is connected to the hubcap g of the main vertical shaft h, which also supports the circular rack c. The hub-cap is provided with radial arms m, to the ends of which is bolted the interior cylindrical guardwall n, to the lower edge of which is connected a ring-bearing 16, upon which rest the radial bars of the rack Je. i

When the vertical lshaft is rotated, the ciry port 19 in order that its portable cooking` cular rack rotates therewith. The circular guard -wall n separates the annular rackchamber p from the central Hue-chamber g, which surrounds the hub-cap. f

Openings 10l are made at intervals through the guard-wall n and also at 18 through the circular table f for the passage of 'the heated a1r.V f

The lowertier of the oven consists of the annular chamber t and the inner iiue portion s, which is separated from said annular chamber by the cylindrical guard-wall u. This l'lue portion sis comparatively shallow and is provided with a bottom '0, forming the top ot' the open bottom central recess w, in to which the external air passes freely.

The floor of the. lower annular chamber rests on the radial bars 2, which are secured to the lower central bearing 3, through which the vertical shaft passes. signed to be stepped in a ball-bearing supsmooth and regular.

Supported on brackets 4 around the lower portion of the machine is the supply-pipe 1l?4 for the gas, which is designed to be used'fr producing heat. From this supply-pipe ex'- tend the branch pipes 4, which are in connec- This shaft is de-v movement may be tion with the radial jet-pipes 5 which extend through the annular bottom chamber into the middle flue portion s. Regulating-valves 6 are provided to control the llow of gas, as indicated, .and it is designed to locate the jetapertures 7 of the jet-pipes or burners along t-he bottom thereof, the tops of said jet-pipes being in proximity to the to of the annular chamber t, which is indicated) at 8. This top is designed to provide a guard to prevent the great heat in the vicinity of the jet-pipe from acting too intensely -upon the articles on the rack of the middle tier requiring slow cooking. The peripheral wall of the middle tier is made double, the inner wall being separated from the outer wall suiiiciently to provide an annular flue z, extending around this portion of the oven. The top `of this flue is open and communicates with the upper ovenchamber, while the bottom of the liueopens into the lower annular chamber t, in which the jet-pipeis located. Each tier of the oven is provided with suitable doors, as indicated, the door10 of the middle tier being provided with a -iiue Z between its inner and outer walls, whichvwhen the door is closed communicates with the flue 2.

The inner Wall of the ue z, near its upper end, is provided lwith openings at 10, and similar openings are made through the cylindrical guard-wall which separates the Huechamber from the rack-chamber. The openings at the top of this Hue-chamber are designed to Aact in connection with a circular damper-plate 11, whereb the passage of the heated air may be controlled.

The machine is designed to cook any article requiring such process. -Articles which are to be baked by comparatively slow process are laced on the grates of the rotary portion in t e middle or baking chamber, and the rack device is turned slowly and continuously by suitable friction-gearing, the speed being timed to finish the baking process 1n onerevolution, the operator loadlng and unloading from the same door at the same time. The

, main door is therefore normally open while baking.

Articles which are to be broiled or cooked quickly are designed to be laced in the lower annular chamber, where t ey will be subject to the direct heat of the flames from the jets of the burner-pipe, and articles which require more moisture in the cooking are placed in the upper chamber, either on the wall-shelf e` or on the turning table'f, interior to said shelf.

'lhe heat is derived from a series of radial Gas-burners which are located in the annular laower chamber. Eight of these burners or jet-pi es are usually employed, and the heat there om is at irst mainly directed down- Award into the annular broilin -chamber,

where lit divides, part going up 't ough the Hue-chamber of the oven by way of the openings 12, in the innerwall of said chamber, and part up through the circular peripheral iiue z.

If it be desired to et more heat into the upper chamber, the ue-dampers are reglulated accordingly, and the escape-pipe signed to be connected to the top of the oven should also be provided with a damper for this purpose. v

The branch gas-pipes are jointed, and their upper valved injector ends are connected to the burners by insertion, so that the can be, dlsconnected from said burners an turned,-

down. The burners can then be pulled out of the annular chamber.

The rotary rack is desi ed to have its hub enga e the top of the s aft by iriction, so that 1n case any obstruction should occur the rack will stop moving, and the grates are made in truncated sector form and removable, so that they can be readily lifted out should it be desired to get at the baffle-plates 8 of the top 8 below them, which form the top of the annular baking-chamber. These baffle-plates rest on flanges e ofthe walls and are readily removable.

Having described this invention, what I claim, and desire to secure by'Letters Patent, is-

1. A cooking-machine,havingac lindrical incasement and vertical central sha a lower annular oven-chamber, a top chamber, and between said chambers, a double-wall middle chamber, bearing upon said central shaft, and a rotary table-top which forms the main floor of the top chamber, substantially as specij fled.

2. A cooking-machine, consistin of a cylindrical incasement, a lower ann ar chamber, and above the same, a double-wall chamber, in combination with a table-top to said double-wall chamber and a rack within the same carried by a rotary shaft, substantially as speciiied. j

3. A cooking-machine, consisting of a cylindrical incasement a lower annular chamber provided with heating-burners, and, above this chamber, a double-wall chamber having a rotary rack and rotary table-top, substantially as specied.

4. vThe combination with a cylindrical oven-incasement havin a double-wall iue around its middle ortlon, and an annular -heatin -chamber be ow, of a rotary rack,.in

ner wa l and top for said middle portion, substantially as specified.

5. In a cooking-machine, the combination with an incasement, an annular heatingchamber and a middle Hue-chamber, of a detachable radial jet-pipe, ointed branch pipes and a main su ply-pipe or the gas, substantially as spec' ed.

6.' In a cooking-machine, the combination with a cylindrica casing, its central shaft, a double-wall flue portion, a lower annular chamber and an annular ledge of a rotary rack, table-to and inner guard-wall carried plydthe centra shaft, substantially as speci- I 7. In a cooking-machine, the combination with a cylindrical casing, and double-Wall chamber of a radial arm rotary rack, its removable grates, baffle-plates below said rack, removable radial jet-pipes, a gas-suppl pipe and jointed branch pipes, substantia y as specified. v

8. A cooking-machineI having a rotary shaft, in combination with a lbaking-rack, and a hub loose on said shaft in connection z lvith said baking-rack, substantially as speci- 9. In a cookin machine, the combination with a central siaft and an incasement, a lower annular heating-chamber, a central flue portion, an annular ledge and a doublewall ue between said heatin -chamber and ledge, of a rotary rack and ta le-top in connection with said shaft and a circular fluewall, substantially as s eciiied.

1 0. A cooking-machine, consisting of a' cylindrical incasement, an annular heating-v IOO IlO

chamber, radial burner-pipes in said chamber, a central Hue portion, a rota shaft, and

I a rack having a hub loose on sai shaft, substantially as specified.

1 1. The combination with the rotary shaft, -of the baking-rack and its hub loose on said shaft;the cylindrical oven-incasement and its doors, substantially as specified. 12. The cookingmaclnne, havin thelower 1o annular heating-chamber, and t e central bottom recess, the double-wall flue middle chamber with central lilue, the rotary rack vand tabledto'p, vertical shaft and hub and the radial gas-burners in the 'heatingchamber, substantially as specified.

l I5 In testimony whereof I aflix my signature 

